Abstract: In order to further study the relationship between Xifeng soil moisture and the climate yield of winter wheat, so that people can arrangement field management possibly, increasing winter wheat yield, improving quality, using 28 years 0-100 cm soil moisture data and winter wheat yield data from 1981 to 2008 in Xifeng agricultural station laboratories, it had been analyzed the relations between soil moisture and climate yield of winter wheat, and was calculated the contribution rate, the regression equation was established. The results showed that: the inter-annual variability of winter wheat’s climate yield and soil water content was consistent in Xifeng; winter wheat’s demand for water was development gradually from shallow to deep in March to mid-may; deep water content was the main water source of winter wheat required in mid-may to early July; the soil was storing water in the middle of August to early September; the contribution rate of shallow water was the largest in mid-September to early October, the correlation of winter wheat’s soil moisture and climate yield, upper quantity storage period (0-40 cm) was the most obvious, each layer were significantly correlated at the early stage of the family, upper-middle-class especially (0-50 cm); in the middle of the bearing, each layer were significantly correlated; on the stage, the upper 0-20 cm was negative correlation, 50-90 cm layer was positive correlation; in impact rate, storage period was obvious 30-60 cm and 80-100 cm, early was 10-40 cm, 90-100 cm and 70 cm layer, the middle was 30-40 cm layer and 80-100 cm, 60-100 cm layer was late, and the average of 20-40 cm, 60-100 cm layer.